Chapter 15, Problem 19TE

To determine

The reason for same mass of carbon atoms and oxygen atoms does not contain the same number of particles.

Answer to Problem 19TE

In the same mass of carbon and oxygen atoms, the number of particle is more for carbon atoms.

Explanation of Solution

Mass of any substance depends on the chemical composition of the substance. It is the total mass of each element and compound which combinedly make the substance.

The carbon atom has 6 protons and 6 neutrons, whereas oxygen atom has 8 electrons and 8 protons. The atomic radius of carbon is greater than the atomic radius of oxygen.

The atomic mass can be evaluated as the addition of the number of protons and the number of neutrons presents in it. The oxygen atom has more protons and neutrons, so the atomic mass of oxygen is greater than the atomic mass of carbon. So we can say that the atoms of carbon are less massive than oxygen.

Conclusion:

Therefore, in the same mass of carbon and oxygen atoms, the number of particle is more for carbon atoms.